You might benefit from understanding how applying Auto-fit to page on shapes on Main will be rearranged when a Variant size is chosen.
You could select the lower objects to be (Bottom Vertical, % position Horizontal). This is dependent on what the objects are so you need to consider Scale and Stretch too.

Don't worry about text going weird, you will have set up separate Styles for the Variants and so you can reapply this quite quickly.

When you are working, you can Create a Variant and Delete it and alter settings and try again, all very quickly.

Acorn